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• W4294670164 abstract "In recent years, adenocarcinoma of esophagogastric junction (AEG) has received increased attention from the academic community. However, the esophagogastric junction (EGJ) straddles two anatomical regions: the thoracic cavity and the abdominal cavity. The histological features of the EGJ are different from those of the esophagus and stomach. There are general disagreements among the related disciplines regarding the definition and classification of AEG. By summarizing the views of different disciplines, including endoscopy, radiography, and pathology, a more comprehensive definition of the EGJ was formulated in the Japanese Classification of Gastric Carcinoma (the 15th edition), and the principle of endoscopic diagnostic priority was established. In recent years, with the development of physiological and anatomical studies, the EGJ has gradually expanded conceptually into a complex functional anatomical region covering the distal esophagus to the proximal stomach. The venous and lymphatic vessels in the EGJ are characterized by bidirectional flow, which is an important anatomical basis for the invasion and metastasis patterns of tumors in this region. The clinical practice of EGJ cancer has been promoted by the creation of Nishi and Siewert classification systems. With the support of a series of clinical studies for its scientificity and effectiveness, the Siewert classification is widely accepted by the international community, and successively introduced into major international practice guidelines. In general, the staging and management of Siewert Ⅰ and Ⅱ AEG are recommended as esophageal cancer, while Siewert Ⅲ AEG is recommended for gastric cancer. However, in the Japanese guidelines for the treatment of esophageal and gastric cancers, the Nishi classification is still used to define and classify EGJ cancer. Recent year, a Chinese consensus on the surgical treatment of AEG was formulated by multidisciplinary experts. The main controversies were summarized in the consensus, and proposals that incorporate the domestic situation were also presented. At present, only by returning to the basic anatomical and physiological perspectives, strengthening multidisciplinary communication and cooperation, and with the help of emerging bioinformatics, digital, and material technology, can it be possible to get out of the dilemma faced by traditional AEG classification and staging system.当前，学界对食管胃结合部腺癌的关注度日渐升高。食管胃结合部跨越胸腔和腹腔两大解剖区域，具有不同于食管和胃的组织学特征，相关学科对其定义和分型等基本问题普遍存在分歧。日本《胃癌处理规约》总结各方观点，对食管胃结合部给出了全面的定义。近年来，食管胃结合部在概念上逐渐扩展为复杂的功能解剖区域，范围涵盖了远端食管至近端胃。食管胃结合部的静脉和淋巴管网具有双向流动的特点，是该部位肿瘤侵袭和转移规律的重要解剖学基础。Nishi分型和Siewert分型的出现，推动了食管胃结合部癌临床研究的发展。Siewert分型获得广泛认可，被相继引入国际主要临床指南。目前一般建议，Siewert Ⅰ型和Ⅱ型肿瘤分期和治疗参照食管癌处理，Siewert Ⅲ型肿瘤参照胃癌处理。但日本食管癌和胃癌治疗指南中，对食管胃结合部癌仍使用Nishi分型。近期，国内多学科专家共同制定了食管胃结合部腺癌外科治疗的中国专家共识，对当前相关领域的主要争议进行了总结，并结合国内情况提出了建议。只有回归基本的解剖学、生理学视角，加强多学科的沟通合作，借助新兴的生物信息学、数字技术、材料科学技术，才有望走出传统食管胃结合部腺癌分型和分期面临的困境。." @default.
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• W4294670164 date "2022-09-01" @default.
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• W4294670164 title "[Dilemmas in definition and classification of adenocarcinoma of esophagogastric junction: from history to current status]." @default.
• W4294670164 doi "https://doi.org/10.3760/cma.j.cn112139-20220424-00181" @default.
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